/* ----------------------------------------------------------------------
 * Project:      CMSIS DSP Library
 * Title:        arm_min_no_idx_f64.c
 * Description:  Maximum value of a floating-point vector without returning the index
 *
 * $Date:        10 August 2022
 * $Revision:    V1.10.1
 *
 * Target Processor: Cortex-M and Cortex-A cores
 * -------------------------------------------------------------------- */
/*
 * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the License); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "dsp/statistics_functions.h"

/**
  @ingroup groupStats
 */


/**
  @addtogroup Min
  @{
 */

/**
  @brief         Maximum value of a floating-point vector.
  @param[in]     pSrc       points to the input vector
  @param[in]     blockSize  number of samples in input vector
  @param[out]    pResult    minimum value returned here
 */
ARM_DSP_ATTRIBUTE void arm_min_no_idx_f64(
    const float64_t *pSrc,
    uint32_t   blockSize,
    float64_t *pResult)
{
    float64_t   minValue = F64_MAX;
    float64_t   newVal;
    uint32_t blkCnt ;
#if defined(ARM_MATH_NEON) && defined(__aarch64__)
    float64x2_t minValueV , newValV ;
    minValueV = vdupq_n_f64(F64_MAX);
    blkCnt = blockSize >> 1U;
    while(blkCnt > 0)
    {
        newValV = vld1q_f64(pSrc);
        minValueV = vminq_f64(minValueV, newValV);
        pSrc += 2 ;
        blkCnt--;
        
    }
    minValue =vgetq_lane_f64(minValueV, 0);
    if(minValue > vgetq_lane_f64(minValueV, 1))
    {
        minValue = vgetq_lane_f64(minValueV, 1);
    }
    
    blkCnt = blockSize & 1 ;
#else
    blkCnt = blockSize;
#endif
    
    while (blkCnt > 0U)
    {
        newVal = *pSrc++;
        
        /* compare for the minimum value */
        if (minValue > newVal)
        {
            /* Update the minimum value and it's index */
            minValue = newVal;
        }
        
        blkCnt --;
    }
    
    *pResult = minValue;
}

/**
  @} end of Min group
 */
